Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '260b7e253987ceaf44a344f991aea29ff3564fab2e6a67d112a3e5d98bb01e0e' 
  AND token = '2V23Povaze/ZHdHObscqEgSbUsdfy7q3JlQf33JHKWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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