Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0faf9f347dc50298ab0d48938a111fc9ea5c3f570a0306c440216f5ec6e5700' 
  AND token = 'wEac5vpPferroZncmiJKYugd+t9Zf1GVWQeeJa2jNu4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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