Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2599306627439b2f4b6a0acb6e6b48495ff7118c1cb21b70763e6a2437b002c2' 
  AND token = '6VcjS11T3TQk3f6ukj5799kyE/V8Wymg5+sQSvM6RdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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