Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47ac5987d649990b68393867f99b80e6e84c1b2903f85e29a121be14d1ba151b' 
  AND token = 'kF3n63zbgitURtvM7oroNkGj6wqaG4f566qUphglj1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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