Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '113ed426e5022917ea1a45848bb479b00b9b7ac4a34590ee2cc0288ab6427a52' 
  AND token = 'UqocY2ENSnyihwgxQev+5u3WI6nFrkmp2SsSeq46wn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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