Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a0789247f3c717c6a89f4b7bae08e0d452571ac8996fbf109ca03da6361601d' 
  AND token = 'OgE4GIFxZUgc5moDQbhkQ8TSUGxZFT81qxedVrsS3+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}