SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95bc5375a0d666982b2d61e0673a53837a3ae6bc5e1f8d179bb10a0e4de767e3' 
  AND token = 'YRNvX/+G0Xu+BzUmPlW0Ezpxr/tP/xZ4wYZMggd+lCU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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