SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '28f2b71ebda5b764d3b6a1a748edd825cc42d96f1f52f5f3663c5c0812f05001' 
  AND token = 'Rra2YTsJ+QkahRzHtRZnHautVBPLOAAp36GeXxxpTN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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