Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83319f43d90f8d464a5d211920373b8fb5b8100f2daee1d8ff423f854413d993' 
  AND token = '1MxtEOO5UTvIpzNUimdVqCY8frPIZPWFrQ47lVBPJ2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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