Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0caa4d823160f861870259b134541c280f7721dbb189d18eb1ef6ec020def34' 
  AND token = 'F1IYwZ75AYJQTI06rLhaxIo3wGowymkUnJ9IxIcDFXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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