Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a49a7072f157e5fb7898ccc022277988a03e1e12243dee7d25c2aa1597c47fe' 
  AND token = '3vbDJ5dxyQ/7vJIMVYVsikt4YxqO4PUonTzroCgxt8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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