Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b072b4612a2033b67b3ecc0243d66c8b9b732e5413c440d7b3a275f241c3dcaa' 
  AND token = 'b0QKc0PpjQqaffje7CrPXIeUijSCA8qF00JeNXBULCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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