Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32f5f7949771c2896629aea29d18aaaf7c5bc66185cdc0359855482a8e0f9dc8' 
  AND token = '0sC/J3kFY6wcJLaBXoYSAqLme8Sn+aRhwLBwCz5IAQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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