Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '954f5d147ea5d67d1b0fe295ebd8196c92929e6a10f157c7698857cbde3abd1b' 
  AND token = '+tjkXJITqb4AucLV37zagbTWTyIZljSm+A0YoZSBkZg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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