SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '14f3a7f953393ab8228c1bfc4403ef8901f9ad5d3df301c96a100a9b1b640981' 
  AND token = 'ueAQb8Fs32/5bYqAW5jvpYjTBIoqAcmX3KvJXRVCdkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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