Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fef4eeda8329124f9e35b61487de4443da65270610534a0a9c67db09867b84a' 
  AND token = 'h3wUnEoKZ4XlIN5zd5dkqQXlgL84VqTNUwN9Ah6gg8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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