Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '624cc36f02f0f2370adcb80c5bb07ce646ae368386982242fa6e8c4f48877ab3' 
  AND token = 'mUhn0uMZMmkT950NlsVDkKi6QrwkxLhwvGmpWs5KIcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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