Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e1b135d447653bc6f6eb48a6aaefca7ddf07e2b2cb2a855957a63cb82addba0' 
  AND token = 'yKq0gqzIxeVFIe78s6A3rfCeIVO3oKKD8P7Zs27g/Fc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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