Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '687fe8502b425852499485e2df8af698771b345e1b78bc9e9d7b2596d98060c2' 
  AND token = 'tgFLxtW0yQkWeNqiLMYRDd8fu/NPB3K6jBFqU6jh/eE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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