Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4602cb5afba5a192bbbf27ac5a7ba807cb02464a64dcb8dba8dbebcb737287a9' 
  AND token = 'Yz1gUFB9OwAaH9ExHntclsMQDEYtyHy+gtijJqI/KH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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