Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0300cd5319b96c8d2b2e5df53b6346185ba5cf7c3558b2db074445df2bad0e7' 
  AND token = 'tlJGsyUI3Sp5aZ4aGC7D1YE/vQHw7/9Yzei0CcezNMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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