Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cfa191fbc8e0e05416cb117bef3400a911916e212bec65d9fd13976fb3e96ee' 
  AND token = 'n+70WnfZWFcHRy0al8aox3KaVKbTZbHHZah1anyxMcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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