Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '573f7ea7cd053cde7b4e55be332e7ec657245f9c0c124fa8208431ddc7fda84a' 
  AND token = 'zI8SfZ1NcX2RQ2t5bWosIhfd18UtNH3XH6FERmeaqr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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