Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fbafaaae4d4b8144c60fa89808a249e74ac11ac52e321844706591eb677eefe' 
  AND token = 'ZR7eQPyn/Wky2E+lLiwi9wgQDRdhCbSrYiokSt+Mtps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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