Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e73ae5e7a65bfbc4b45a3bb8a65b2bbdabafee298adb7cc8767867731f08583b' 
  AND token = 'W1tzAvqF18NCLZLP23awsVpGoRSPZ9oOaHnM3CiTbpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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