Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc92689959aa709bbe6031b37d77cbecce37148a99df4d32cbd4e080ed060c3d' 
  AND token = 'J0PuNaB9xv/b/aaQz42G02FOU+GMkcSQUfK5qvDH5uM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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