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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '804f24187e4c2285f1947874774550d6f2b157c426c1acaae233fdd236adbc60' 
  AND token = 'nzbxjuoLFfRjuqa0dqo0hL0GwCjnTzGFZC9yLpyJxz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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