Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48efedea868c2e16dff193decc56135a3c3de0050613c93d0cec42addc439458' 
  AND token = '4TDEPoIk4EGq5AfMNwNq8CIxZvVRG5iF+c5x1qRVmrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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