Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea619c6e60cd8a142556f2f594896b71d157ac105762b82294be221e7021521b' 
  AND token = 'Q3C4lrMXO6DqRVj8lllOGVYbm/Czufyz+o5nkzGl9sU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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