SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '894aed3416f85af89ee7712bdc2153c3cb4ebf5ee774f666bfdc5d750d819960' 
  AND token = 't/9OAOkVCdRX41DVBB8Htv+2JnQbaVZJ1og1BR42RTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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