Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '734df3bbe4a84353a9678b6ecb508a00811b7e00927c8736987e86c14aed42b5' 
  AND token = 'KzPNSeKnY2oCoFO86EWZrBiCkc/yHJd8m60sI2k+GRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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