Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e59a0fa1c3bbf5c3aa641d2b5e6ee7304b0af564feec14ccdb1fa7b4bfaeac8a' 
  AND token = 'ceZqgtLwlxKWsXYZjhVhd4dCaDoaOhKf+JDvlxIHm/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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