Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d821b9bb11e0a85b97f46ea9f78db9afe2b766e7128f02b3a5bbad91118e0fc' 
  AND token = 'qaitNTUQ/PKUxdF3I5QV/JPlCSDlOPPSCSJ8Nu3pI+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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