Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37129c55b1f348897a73ab6069282b228c5c71f10342ff78e1df6eb241ac3110' 
  AND token = 'SGK3AyNJMDbMjQfuxEMxy7rp5mf5JC+Mfof1U52KcKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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