Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dba982e5529bca2d14dec17de34e90a8ff2f7e2480a3ec62aa072c1881f1be7f' 
  AND token = 'ORQx9SIhf3r4fO4fWFOMBhpNYPlVZ+gXl1q6gcvsRcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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