Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23ad2481dbba9509bead2e3d4c37aaa05640ef16736f5bf3686153654159ab27' 
  AND token = '83/x68Sc4PygGwMxfyXfc4L8U3gW+LRFbW9ygdmsW1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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