Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd066a87dac04037508c16d82492088860c1d6b182081acec93ec0a9bcbf5833e' 
  AND token = '34mcvuObEUZcABEM40HE092bKJjVScyKNnBxtrWzYYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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