Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b82f1d5280eb5bf31fbebad72f06465b54aef86251b8e81fb27656243724ec65' 
  AND token = 'cM1Afph1DW+bVp8UYLSyxTOW0L3lzjP0rdI9ZIFIrW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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