Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b95194034748d53a6d66f875d57cd4ec901de08180956896e85292969056570c' 
  AND token = 'Xm/GQYejNI9GuR8zHAG6OjE9ODNCYBKO7XPqPXtOQY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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