Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c440d28ad0880e0516408e5f9c5216d712008b716beb157bde9069062e30b82' 
  AND token = 'zu4D+xK35PkJnu/XoHH0olDq6TejZ4uYDB4n60WKCGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}