Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3560109cb3cf7b483c2b5d0d26536f5dec98fd4111a6d26508362455aedd2efd' 
  AND token = 'MEiRByzRqAzyCO5Fi7OQWq1FOJxM3JhG5upAdCHXXDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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