Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bb492d653277e8d2bdf8e21c123e14684ea0bf4bb1ec45c470c6c2186f90dd3' 
  AND token = '5zmjb3EbW3NOAwOTUoBIRvIUh9tG9njvzkBxDGESCbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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