Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ff0bd3019fca06f4588e8e9c6b8e9c23dd3df900eece84aba7d9109a49ce0323' 
  AND token = '4gmwMx/9QRNxqxhgRuGtSO4cX0p9X+ngzXhGWF71Kb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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