Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '366088d29693950b07e894308c04795161fffcdbc9bfafd0fe90789a50df7d06' 
  AND token = 'c39pgT9HzZga9PmP+rN31PDCm5dg+V2tDdZf8dBnLeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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