Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b37bb71ec7022d95de32992e28eedcbe18a02669c18018669996c601c163db95' 
  AND token = '1A4bG9dtCp9+uzWqxjcOwMsBEscpzz02Z48HFWhkt+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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