Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14ddc336f9bffb48f99812486a4bf7f4c76361e7a733ef9053cfc8b03f4830d4' 
  AND token = 'trCoDXPaqI3YHoPr7jlDCLCyG1Sw83UGe/+FfQT8ixI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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