Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '011768813a2bb19386b9f3a6a6481555b81a8063210ebe8a6abb18db0c59ce79' 
  AND token = 'jAM3j9GSWT06l4TVEgMCjWqfCgTyMvL0Ldd7h3+8uMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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