SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a114311df89273ad1cc265e6145ff3bdec8aee3a8b5a43bf5ca8cb0de54b290' 
  AND token = 'IHp7wcK1qgRLyDuBrameJWjVMqVAL3nVCefYKlN/xY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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