Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b403d5940bc2911f4ec04c77b1e6e3953d74edd3e3652be0bfddd9384c4e2cb' 
  AND token = 'Nw9W586LTJJrEnKSsa225YhX61pHAxvnI3NRTmASbKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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