Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a261403c241c06d84dd8ba43e09377554998e2160c2ac1a69167225ad949064' 
  AND token = 'ciRcnLURSWv/RxIk0Qpd+6P9uEeMAMH41Esp2Ui6K2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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