Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '038b49cae5d214dabadc0d54f8ab3a230ee7f1461a577c3c3aa4df1117a1d4ea' 
  AND token = 'nQibUv8HZ+YBtrSNuWppABtsS4DqbKt0OZSDRlhZXVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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