Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da24ea5b37ec6fcbb8103d4734c343cb1053d7dd398931958bd86a2c1689c686' 
  AND token = 'C0MF4jkSUZrpatVRi2b+uuabCYdtJNvxhSi+8PdNTf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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