Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0435ad95d62032bf28512718db6c82ee090d4858567b0e808ee034f0c71bd0e5' 
  AND token = 'E6MuYUhtswoNzCQSVxIdtG7O1TZ74gl+gyKWAsLJx1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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