SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bffd1b006ba4677a534a06dd76df907f61e423edda55d9ef9768648f517828b' 
  AND token = '8Asw6E+mv95oLukBOTqACkd5LGSoGX/EKEozPVg5Jq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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