Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f3bbeeab4a9d0923806c3dac2cb5a6d9e0e42827a314155fbb13278e8fd958e' 
  AND token = 'CTO87JP0iemk7BczHdVM525IR8NLsz9wT6s0y2IBb2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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