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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deebe653602a11e71e2331cd4d9a65c2e7ea4d7cb5692213f608333fd6d384f7' 
  AND token = 'G0fsH2z+P/tAPmqUSmD1r6N1ybStkHNge2bGzk/tktw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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