Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc8eb927a48f31f84e959b984764108a3b50b45e0492a0f532690b9899dbdcac' 
  AND token = 'EGfBc6vmk7qbLJ6zG+ITgopG6q04DwhhyN6aWahp1ck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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