Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3013c617c23417c49d5c0905bd21a64efea37ff224122b45e4fe31b109a382f' 
  AND token = 'cX9Uk+Omq2jBspzUlpS4Vu7OBEoYd2gRoo6KIs3S5Ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}