Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6be1260a0d52bbd5a52a12eef671fb65421e99940123ebd9e48abe2bed32b6ad' 
  AND token = 'A7DuV2vanxaoS4y4CS+qsWOm6UWU+/arxJQKhAJ6v1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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