Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1060ade5f5ad10e09129427f8d22e99e27d7ce30f841b6a17fec3dfc089b0988' 
  AND token = 'f2zHe+Xbq/rWh+qzz/KLIAtaQEIqP1Fc6BconRcZ3WM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}