Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01e6f1fc15cc4940403323bf35bb1d98021c91cfaae8c280dcd1f1f6c7a9e7ce' 
  AND token = 'c0ErHXRicQMrNNwUNxh0063Ysnr37548nn1p+l7qMrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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