Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95d8e9bd7899220221e59d4a2ae541f644b618665f45b6251a57fe287f90cab1' 
  AND token = 'SxjxLfMKVSRB8psNOLnhL4lSvFU/lK5IQ4bcIRihiQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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