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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dba17e54fc3c5d6f7449714d96cba4e666774a09a27ab733b4d516739394ea5' 
  AND token = 'q56lu0jix7uoqja0RpteHHHDp4iDciRE9P36dutCqjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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