Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b848c6788a514d3f318637a05452b23dc6e59ab4289c297a52ba1cfa64662c6' 
  AND token = 'BPy1wlt4u2SYyHkq01lNqHEqdQviiqsnCEqQyt0tKmo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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