Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4df36f3f5f3cc70b19e48c35d2c7b425d5f4ba13f5259b204a615b7a7d3b1153' 
  AND token = 'P4kj1s/XQpHvaAmA1x30+w6m+2ZE/uzXbEoj0eWqmbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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