Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd95499682047739fcb8a4d6594bb68f903282edc0893046ad36fe1070dddbbf' 
  AND token = 'sfxhYcyB9y3gfbqfWT3Z1SwvKVfJXr0+YDDkroCWjrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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