Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd366fe7cbfd79a6d4fae9fae0b6892627b8b67cc5db877ccbcbe82f0505d19b' 
  AND token = 'lUOQFjuG6uDZ7XbyZ03Nr9c/u5iV5b9q5jQyaywInfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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