SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3207f41e36c2434c667ad7998af08491f41bc555733a089fd6cb91d2b6965c40' 
  AND token = 'OXLKZUSZcmxo8jcDXqOb9NwKOhIXI+Yg+gTMo6MsaT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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