Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3205e424d0b85b6571184885d03493fc2e0a39eaeb70a294589813970f8478e' 
  AND token = 'SiJ/emI1Pn9KI4YnqnfY+5pglHr2NRVP8S6DYlxSDjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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