Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f61b1cd3751372ec169fee33a2c90cbb32da96f5b8c82d86eee70c839b811384' 
  AND token = 'TWd1Fp8zYIIzLaD9npww8XQcN82mACER9f55Pf/niow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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