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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef956140d3bbc39d4747e8c8f5baafe6dc533ec55b1aaa776760f9bc3024be94' 
  AND token = 'C89yWBodP6RJNj3K2bmKSjonjdy+a7RgL2HSZpuMWpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}