Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '511532e206c1f94c74f1cb2cec3948ab06b2e86fb7c330e0bc4f133f0b2900e6' 
  AND token = '7Qdn5SIBCp1Vy/oNDol9DofsQGepu53sVzuIaDV5u6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}