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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9bd98656ad452fb3283b2e18ee366da29d7bcbd2d6b816f9e6481e4a359c9233' 
  AND token = 'HNUYvvUALuTB2vmG61CNX88DwOHIskrbyY2Xr64noWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00566

JSON explain

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