Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bd1006a91cd0a5629fa34fb79f09638452a066e869b6491ab2c4f486e8493a3' 
  AND token = 'FCRuFSyX8BMyPtOKBnij8PCAccaCkPyNYgm5w/t0+Pg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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