Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89b6a0a71a81b1faf11886bd58cc1ec2c646d695db3f330e20ef1d6499156f81' 
  AND token = 'uBOfSTLto0U1dBfM6SmNMGvmTfCtaHQzXkFkBpBsz7E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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