Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2d832974852624dcf8ce29fd0735e047766b8a1b2b2e9b71b323cd8bf2c926f' 
  AND token = 'w2L+1ame5rodSD1a/kbCkLhp8ZVwqXRPseQmg+VtRJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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