Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d2fd8766f0edd6da568f70364103d1e60c2384b5f5ba113d25b1a1a71be94c8' 
  AND token = '5zK3dCBuLD5nhftIxI0qmTAf0aU4K1TfErJYT/qf2xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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