Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '028016c06940ade44c3c13575cda4505f57de8014ce960dabd2366aad1131140' 
  AND token = 'C5G/4iDKtKUgizqi5tKVecL2x22dohkFnd5iMQxivcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}