Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1fea8cbe8239c9529040a13100724e7bbe2e0bf27130f68786f1273c0bfbb88' 
  AND token = 'geMQU3gx/yLHEDR3nXfJGABFl+EuCTktLyi1sAh6rU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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