Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf349200cec33f9ba93a4662bc5d07d3cbc0d31892d5c77e088c6ab96e44749d' 
  AND token = '5jfE4BgvzeBl6n4HVPAA9EnAKrR4HTa6kaczyu4/6cY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}