Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1771936bb2b80f777cbcf974a2eb99f8b9d16c948fc85a084e444789fcb81af' 
  AND token = '/HG2NsifoPMTP1V7kraUO/ZLXfT8hwU0QHnucz34kX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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