Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c57714abd2dbe375eec21669545a745b102b67b4750ade2b6b4222143e2a12f2' 
  AND token = '1FfJFi22PFVg9kFNP55Q/bjcd3JJpVnVaRYqlQUXvp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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