Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53316f298d67b9ae0e394e9f8b00e6dd96d21bf209dc82390edf7b210fb8cb81' 
  AND token = '9GnX/GvKv2Ay7p8DzZk7BMGHktcazh97TP92nDL5ZsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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