Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f0de6193e13a97ca262252a2a19e3ce63817efa85f896fe2e7d7be96bf406ae' 
  AND token = 'NE8Rd+2u8Qms62aKUy23BcRsgD9swqj9ldqYNUgdgeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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