Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ae2217b96f13871435d6f93a93ac2f1bd03a3f07d3a1b5abcd2a8f7df3f3268' 
  AND token = 'UCOkdUcV/ARoO4YppJO+HavaS05I6G1o7+VX6bHBR+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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