Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caee605f67a4fe6549d1055ccbb2d651a48d9a2b1af0968301000e9e31e3dbde' 
  AND token = 'QKbMCFlwTr5/S74DLcuOb822Vr6ue7DZrA/SFJWgKi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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