Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6edd09cdc9f3daca29bf8dbb4e2f69d958876303968f909ab7be10921c900690' 
  AND token = 'XimR1QaCCF1v33ivUx+vG7ZhqoryqwXL7nXbB5/uD5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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