Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'da385ca5f883fe5da8038c1c78daa6c91be46d3bc692a4ce46ed3d936f18ce52' 
  AND token = '2jGLOg6qttXea/2PrIZyrvUDy0Tb9q/qVkwiNAVS1Aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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