SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5630e278fed90a01dcab2e70fdb4223b401df7045059720dafe1f84e98847989' 
  AND token = 'FuVX4iNqBJK3P/5YCa9KKLiUMQQgk6T4/W5gGDG+M5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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