Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7de8efa91bb49ec2c8625472df549e2f1160797e1b269020e8794e5d23b2ef87' 
  AND token = 'Q5RoMCwLMxwIKqQ7D24eGNye5exHyV1PVLkhFiv9qTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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