Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '744c272b2931b5b8ef6d7a61072fd682a7dddd46f1aed16a0bfdb7163c0f1f47' 
  AND token = 'FKA7AFKNFPpRbPIYAkgggrzsBzr7wgxtQX8dK5ZZAWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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