Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a1446bee5feaf2f624cd2d54bdd290883336172054501530fe8b0d3f25b43b9f' 
  AND token = 'v3J10Kss68XF1HZoQADgyJ19eXN+oBTcc9VvrAg/VdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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