Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0517b8ee856593a7172d0e40500a9c990b05d3f54d7b15fc348bc1db87e1c968' 
  AND token = 'WG5SpCWdhk6yJ9qjbRp0pLC5F344xL+qKKktkUCNKCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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