Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43b16020b7d7688db5dba50e3c386144c4a2b475dceda6c7b0e1cfa2b318d400' 
  AND token = 'oB95P958p+RCMSl51HiUzFBzrvXCI6UxFmtxGpLDkd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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