Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53aefe25074cee6c8087b24bf54984a01d6e0e9c5304ff20ba18e034f8a66ef1' 
  AND token = 'alECU1K08zg6TpPuagHdBHEC/aNbmNyguwxmS1VmjKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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