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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3442c6babda919f5531925a785fa02b698c005131020b0ac2fb824b572f55de2' 
  AND token = 'H+OzzqC1osyU0e1G2/kUNi39CHcOc+MrhzYZAzEPZCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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