Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '940706e258b193ecd3ba4ca0ad46a76065798ffeda0717e3967e17db66895ef5' 
  AND token = 'g9jjMCe+6fjNlEWRIu+6yyQpVnKTp1wLIe3I1AH9DOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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