Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36f1efde8a7c04768ddf41547eec5573b8a1df1c92fb2caba990b17cb8ea2053' 
  AND token = 'dM+CZ/XxM4HQnjtPZca+0OmdbBKaefS6wohpc4mJpMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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