Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6b06cfccb275d0052ea53c41ff9958786bafa1de1be6c80c7383ccc2e35fee9d' 
  AND token = 'WunBRHQnvZ1uejNeNwBtvRHfwv0mAgux56fML3fuzQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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