Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e38b8156b3def085802ca77c357304be5604be08fc194c6ad30f0a16836ad40' 
  AND token = 'XaVZcRR8K3AM8mRw477IUtg1pM3G7SBi+ZdmCMGUeg0=' 
  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"
    }
  }
}