Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f26473815411b16ab60f058a9fb47a198e5e56e747f355c1f2a3e37e377f8fb6' 
  AND token = 'ZeLUrPDXwOQa6vBpNC/7IXQNCiyXmDG9c6p5AcYH8MY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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