Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27dab2d72f3637ee0790d1f023cd341af204aa77da0c43721dc80a40ac9d14d7' 
  AND token = 'a6HMUM6/WUjWDFsCgdoZQ4+OtsYMXg+nDnvwndZhMns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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