SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '11f4c1b906356c9f388b1c307c449daaaca5cf36036cb62596582d47c8f3b2a7' 
  AND token = 'wtLwXn5vV/QyMMPhWWljqJ5U8G6skxfALITBGidQbiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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