Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bd1b141ac3110f20e00ab0c3369e93da67e94e1335fc1db223ca9ed6aee4bc8' 
  AND token = 'V51Jv2reiZNIN3owCxz4H3V8EjKvX7n8nL0L18w45gg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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