Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9f5b9f6a3ce699797b5d05d6df6297b7a124ab2985edd2ee97fbe671419d778' 
  AND token = '3Mc+ufqTRwZfQoIFkEryO+1e+KaUhjcw6vStJL+vNZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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