Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0551b1de86badf3df6ef34d11cedc4b1adb191134c67c5cf3e2f932f45c662f' 
  AND token = 'PtflVKMFByBHZtPmALVA0hnoCwCGo6xGZugNS8eCmg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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