Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b03d00c478228cfe497684da3ae0232fcfc5f2ff9b53dc654438abcf1e3d95d' 
  AND token = '64Ei3KEutTFBH8qEvQlLLb0LZT5vrkWyPDmhiMJcHmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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